<html lang="en">
<head>
    <meta charset="UTF-8"/>
    <title>SpringSecurity</title>
</head>
<body>
<h2>登录页面</h2>
<form action="/admin/login" method="post">
    用户名：<input type="text" name="username" value=""/><br/>
    密码：<input type="text" name="password" value=""/><br/>
    <button type="submit">登录</button>
</form>

</body>
</html>